The people knocking Avatar were either expecting something different when they went to see it or they're among the group of people that go out of their way to dislike anything mainstream in an attempt to make it look like they are more cultured or intelligent because they like obscure, low-budget art films that the rest of us "uneducated, normal movie-goers" just can't appreciate.
In actuality Avatar gives you everything you pay for. A visually stunning film with sufficient acting, and a good (although unoriginal) story. It's not the greatest movie ever made but it's an extremely enjoyable experience, especially in 3D. In fact, it does 3D better than any other film to date. It's well worth the price of admission and definitely worth paying an extra couple dollars to see in 3D.
